SIMPLIFIED METHOD FOR EVALUATION OF ASPHALT PAVEMENTS --PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON THE STRUCTURAL DESIGN OF ASPHALT PAVEMENTS HELD DEFLT UNIVERSITY OF TECHNOLOGY, AUGUST 23-26 1982. VOL 1 AND 2. -- NETHERLANDS

This report describes a procedure to evaluate flexible pavements in a quick and simple way by means of deflection measurements with the falling weight deflectometer. Full depth asphalt pavements and pavements having an unbound base layer are considered as a linear elastic multi layered system. With the aid of a computer program developed by chevron, deflections and strains at the interfaces of the layers are calculated. At a standard asphalt temperature of 18 deg c the design life of a pavement, expressed in a number of standard axle loads, is derived from a permissible strain level in the asphalt layer and the subgrade. Due to a test load of 50 kn the characteristics of a deflection bowl are related to the design life of the pavement. Within a range of operating temperatures of 5 to 30 deg c the results of the deflection measurements can be related to the standard temperature. Related to the deflection characteristics the residual life of a pavement can be estimated from available data about passed and expected number of axle loads. The simplified evaluation method is an aid for determining road sections having a high priority for maintenance planning. The method does not deal with determining overlay thickness. Detailed investigations of selected road section together with economic considerations will give the answer to the way in which the pavement has to be improved. For the covering abstract of the conference see IRRD 815640.

• Corporate Authors:

  INTERNAT EXE COMM. STUDY CENTRE FOR ROAD CONSTR.

  PO BOX 1062
  Ba Arnhem,   Netherlands 
• Authors:
  • Van DER LOO, JMM
• Publication Date: 1982

Language

• English

Media Info

• Pagination: p. 475-81
• Serial:
  • Publication of: INTERNAT EXE COMM. STUDY CENTRE FOR ROAD CONSTR.
  • Publisher: INTERNAT EXE COMM. STUDY CENTRE FOR ROAD CONSTR.

Subject/Index Terms

• TRT Terms: Asphalt pavements; Axle load force; Computer programs; Conferences; Deflection; Deflectometers; Deformation; Durability; Elasticity (Mechanics); Evaluation and assessment; Flexible pavements; Full-depth asphalt pavements; Interfaces; Maintenance; Pavement layers; Planning; Subgrade (Pavements); Temperature
• Subject Areas: Highways; Maintenance and Preservation; Planning and Forecasting;

Filing Info

• Accession Number: 00482998
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 31 1989 12:00AM